USB interface switching device

Abstract

The utility model provides a USB interface switching device, which comprises a multi-path switching circuit, a first-side first USB interface circuit, a first-side second USB interface circuit, a second-side first USB interface circuit, a second-side second USB interface circuit, a second-side third USB interface circuit, a second-side fourth USB interface circuit, a first switching power supply circuit and a second switching power supply circuit, a first side of the multi-path switching circuit comprises a first group of USB channel interfaces, and the first group of USB channel interfaces comprises two USB channel interfaces which are respectively connected with a first-side first USB interface circuit and a first-side second USB interface circuit; the second side of the multi-path switching circuit comprises a second group of USB channel interfaces and a third group of USB channel interfaces; the second group of USB channel interfaces comprises two USB channel interfaces which are respectively connected with the second side first USB interface circuit and the second side second USB interface circuit; according to the device, the control equipment can be conveniently switched and connected to the control computer in the purification workshop.

Description

Technical Field

[0001] The utility model relates to a special switching device, in particular to a USB interface switching device. Background Art

[0002] Semiconductor equipment requires a clean environment when working, so it is usually installed in a clean room. The control computers of some PVD or etching equipment need to be switched by different operators inside and outside the clean room.

[0003] In order to meet the need of controlling the switching operation of a computer, it is necessary to design a simple and practical switching device for controlling the USB interface of the computer. Summary of the invention

[0004] In view of the shortcomings of the prior art, the embodiment of the utility model provides a USB interface switching device, so that the computer control equipment inside and outside the clean room can be switched to connect to the control computer in the clean room. To achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0005] The utility model embodiment provides a USB interface switching device, including: a multi-way switching circuit, a first USB interface circuit on the first side, a second USB interface circuit on the first side, a first USB interface circuit on the second side, a second USB interface circuit on the second side, a third USB interface circuit on the second side, a fourth USB interface circuit on the second side, a first switching power supply circuit, and a second switching power supply circuit;

[0006] The first side of the multi-channel switching circuit includes a first group of USB channel interfaces, the first group of USB channel interfaces includes two USB channel interfaces, which are respectively connected to the first side first USB interface circuit and the first side second USB interface circuit; the first side first USB interface circuit and the first side second USB interface circuit are used to connect to the control computer;

[0007] The second side of the multi-channel switching circuit includes a second group of USB channel interfaces and a third group of USB channel interfaces; the second group of USB channel interfaces includes two USB channel interfaces, which are respectively connected to the first USB interface circuit on the second side and the second USB interface circuit on the second side; the first USB interface circuit on the second side and the second USB interface circuit on the second side are used to connect a group of computer control devices; the third group of USB channel interfaces includes two USB channel interfaces, which are respectively connected to the third USB interface circuit on the second side and the fourth USB interface circuit on the second side; the third USB interface circuit on the second side and the fourth USB interface circuit on the second side are used to connect another group of computer control devices;

[0008] The multi-channel switching circuit is controlled by the USB interface switching signal CTR_SEL, and is used to realize the switching between the first group of USB channel interfaces on the first side and the second group of USB channel interfaces and the third group of USB channel interfaces on the second side respectively;

[0009] The first switching power supply circuit is controlled by a first power supply switching signal PW_CTR_SEL1, and is used to supply power to a first USB interface circuit on the second side and a second USB interface circuit on the second side when a first group of USB channel interfaces on the first side of the multi-channel switching circuit is connected to a second group of USB channel interfaces on the second side;

[0010] The second switching power supply circuit is controlled by a second power supply switching signal PW_CTR_SEL2, and is used to power the third USB interface circuit on the second side and the fourth USB interface circuit on the second side when the first group of USB channel interfaces on the first side of the multi-way switching circuit are connected to the third group of USB channel interfaces on the second side.

[0011] Furthermore, the USB interface switching device also includes a switching indication circuit for indicating the connectivity switching state of the multi-way switching circuit.

[0012] Furthermore, the multi-way switching circuit includes a multi-way switching chip U1; the first side of the multi-way switching chip U1 includes a first group of USB channel interfaces, and the first group of USB channel interfaces includes two USB channel interfaces; the second side of the multi-way switching chip U1 includes a second group of USB channel interfaces and a third group of USB channel interfaces; the second group of USB channel interfaces includes two USB channel interfaces; the third group of USB channel interfaces includes two USB channel interfaces; the selection switching terminal of the multi-way switching chip U1 is connected to the USB interface switching signal CTR_SEL; the power supply terminal of the multi-way switching chip U1 is connected to the positive voltage VDD1; the shutdown control terminal of the multi-way switching chip U1 is connected to the shutdown control signal CTR_XSD.

[0013] Furthermore, the first USB interface circuit on the first side includes a USB connector U2, and the second USB interface circuit on the first side includes a USB connector U3; the power supply ends of the USB connector U2 and the USB connector U3 are respectively connected to the positive voltage VBUS_1; the USB channel interfaces of the USB connector U2 and the USB connector U3 are respectively connected to two USB channel interfaces in the first group of USB channel interfaces on the first side of the multi-way switching chip U1.

[0014] Furthermore, the first USB interface circuit on the second side includes a USB connector U4, and the second USB interface circuit on the second side includes a USB connector U5; the power supply ends of the USB connector U4 and the USB connector U5 are respectively connected to the positive voltage VBUS_2; the positive voltage VBUS_2 is provided by the first switching power supply circuit; the USB channel interfaces of the USB connector U4 and the USB connector U5 are respectively connected to two USB channel interfaces in the second group of USB channel interfaces on the second side of the multi-way switching chip U1.

[0015] Furthermore, the third USB interface circuit on the second side includes a USB connector U6, and the fourth USB interface circuit on the second side includes a USB connector U7; the power supply ends of the USB connector U6 and the USB connector U7 are respectively connected to the positive voltage VBUS_3; the positive voltage VBUS_3 is provided by the second switching power supply circuit; the USB channel interfaces of the USB connector U6 and the USB connector U7 are respectively connected to two USB channel interfaces in the third group of USB channel interfaces on the second side of the multi-way switching chip U1.

[0016] Furthermore, the first switching power supply circuit includes a single-channel switching switch chip U8, the input end of the single-channel switching switch chip U8 is connected to the positive voltage VBUS_1, and the output end is used to output the positive voltage VBUS_2; the control end of the single-channel switching switch chip U8 is connected to the first power supply switching signal PW_CTR_SEL1 through the resistor R2.

[0017] Furthermore, the second switching power supply circuit includes a single-channel switching switch chip U9, the input end of the single-channel switching switch chip U9 is connected to the positive voltage VBUS_1, and the output end is used to output the positive voltage VBUS_3; the control end of the single-channel switching switch chip U9 is connected to the second power supply switching signal PW_CTR_SEL2 through the resistor R3.

[0018] Furthermore, the switching indication circuit includes a resistor R1 and a light emitting diode D1. One end of the resistor R1 is connected to a positive voltage VDD1, and the other end is connected to an anode of the light emitting diode D1. A cathode of the light emitting diode D1 is connected to a selection switching end of the multi-way switching chip U1.

[0019] The beneficial effect brought about by the technical solution provided by the embodiment of the utility model is: the application realizes the switching connection between the control computer in the clean room and the control equipment (keyboard, mouse) inside and outside the clean room through a simple and reliable circuit, which is convenient for different operators inside and outside the clean room to operate the control computer in the clean room, avoiding frequent entry and exit of personnel in the clean room. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an electrical block diagram of the USB interface switching device in an embodiment of the utility model.

[0021] Figure 2 It is a schematic diagram of a multi-way switching circuit and a switching indication circuit in an embodiment of the utility model.

[0022] Figure 3 This is a circuit schematic diagram of the first USB interface on the first side and the second USB interface on the first side in an embodiment of the utility model.

[0023] Figure 4 This is a schematic diagram of a first USB interface circuit on the second side and a second USB interface circuit on the second side in an embodiment of the present utility model.

[0024] Figure 5 This is a schematic diagram of the third USB interface circuit on the second side and the fourth USB interface circuit on the second side in an embodiment of the present utility model.

[0025] Figure 6 This is a schematic diagram of a first switching power supply circuit in an embodiment of the present utility model.

[0026] Figure 7 This is a schematic diagram of a second switching power supply circuit in an embodiment of the present utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] like Figure 1 As shown, a USB interface switching device proposed in an embodiment of the utility model includes: a multi-way switching circuit 10, a first USB interface circuit 20 on the first side, a second USB interface circuit 30 on the first side, a first USB interface circuit 40 on the second side, a second USB interface circuit 50 on the second side, a third USB interface circuit 60 on the second side, a fourth USB interface circuit 70 on the second side, a first switching power supply circuit 80, and a second switching power supply circuit 90;

[0029] The first side of the multi-channel switching circuit 10 includes a first group of USB channel interfaces, and the first group of USB channel interfaces includes two USB channel interfaces, which are respectively connected to the first side first USB interface circuit 20 and the first side second USB interface circuit 30; the first side first USB interface circuit 20 and the first side second USB interface circuit 30 are used to connect to the control computer;

[0030] The second side of the multi-channel switching circuit 10 includes a second group of USB channel interfaces and a third group of USB channel interfaces; the second group of USB channel interfaces includes two USB channel interfaces, which are respectively connected to the first USB interface circuit 40 on the second side and the second USB interface circuit 50 on the second side; the first USB interface circuit 40 on the second side and the second USB interface circuit 50 on the second side are used to connect a group of computer control devices; the third group of USB channel interfaces includes two USB channel interfaces, which are respectively connected to the third USB interface circuit 60 on the second side and the fourth USB interface circuit 70 on the second side; the third USB interface circuit 60 on the second side and the fourth USB interface circuit 70 on the second side are used to connect another group of computer control devices;

[0031] The multi-channel switching circuit 10 is controlled by the USB interface switching signal CTR_SEL, and is used to realize the switching between the first group of USB channel interfaces on the first side and the second group of USB channel interfaces and the third group of USB channel interfaces on the second side;

[0032] The first switching power supply circuit 80 is controlled by the first power supply switching signal PW_CTR_SEL1, and is used to supply power to the first USB interface circuit 40 on the second side and the second USB interface circuit 50 on the second side when the first group of USB channel interfaces on the first side of the multi-channel switching circuit 10 is connected to the second group of USB channel interfaces on the second side;

[0033] The second switching power supply circuit 90 is controlled by a second power supply switching signal PW_CTR_SEL2, and is used to power the third USB interface circuit 60 on the second side and the fourth USB interface circuit 70 on the second side when the first group of USB channel interfaces on the first side of the multi-way switching circuit 10 is connected to the third group of USB channel interfaces on the second side.

[0034] In this embodiment, the first USB interface circuit 20 on the first side and the second USB interface circuit 30 on the first side connected to the first group of USB channel interfaces on the first side of the multi-way switching circuit 10 can be connected to two USB ports on the control computer, and the control computer is usually installed in a clean room; a display can be installed inside and outside the clean room respectively, and the control computer can output display signals to the two displays at the same time; inside the clean room, a keyboard and a mouse are set, which are respectively connected to the first USB interface circuit 40 on the second side and the second USB interface circuit 50 on the second side connected to the second group of USB channel interfaces on the second side of the multi-way switching circuit 10; outside the clean room, another keyboard and another mouse are set, which are respectively connected to the multi-way switching circuit 1 0The third USB interface circuit 60 on the second side and the fourth USB interface circuit 70 on the second side are connected to the third group of USB channel interfaces on the second side; through the high and low levels of the USB interface switching signal CTR_SEL, the first group of USB channel interfaces on the first side are selected to communicate with the second group of USB channel interfaces on the second side, or the first group of USB channel interfaces on the first side are connected with the third group of USB channel interfaces on the second side. At the same time, the first power supply switching signal PW_CTR_SEL1 or the second power supply switching signal PW_CTR_SEL2 selects the corresponding first switching power supply circuit 80 or the second switching power supply circuit 90 for power supply, so that the keyboard and mouse inside and outside the clean room can switch to operate the control computer in the clean room.

[0035] In this embodiment, the power supply terminals of the first USB interface circuit 20 on the first side and the second USB interface circuit 30 on the first side are both connected to the positive voltage VBUS_1, and the power supply terminals of the first switching power supply circuit 80 and the second switching power supply circuit 90 are both connected to the positive voltage VBUS_1; the positive voltage VBUS_1 adopts +5v;

[0036] More preferably, the USB interface switching device further comprises a switching indication circuit 100 for indicating the connection switching state of the multi-channel switching circuit 10;

[0037] The power supply terminals of the multi-channel switching circuit 10 and the switching indication circuit 100 are both connected to a positive voltage VDD1; the positive voltage VDD1 is +3.3v;

[0038] like Figure 2 As shown, the multi-way switching circuit 10 includes a multi-way switching chip U1, the model of the multi-way switching chip U1 is CBTL02043A; the first side of the multi-way switching chip U1 includes a first group of USB channel interfaces, and the first group of USB channel interfaces includes two USB channel interfaces, respectively as shown in FIG. Figure 2The second side of the multi-channel switching chip U1 includes a second group of USB channel interfaces and a third group of USB channel interfaces; the second group of USB channel interfaces includes two USB channel interfaces, respectively as shown in Figure 2 As shown in M_USB2_P and M_USB2_N, K_USB2_P and K_USB2_N in FIG. 1 ; the third group of USB channel interfaces includes two USB channel interfaces, respectively as shown in FIG. Figure 2 As shown in M_USB3_P and M_USB3_N, K_USB3_P and K_USB3_N in the figure; the selection switching terminal of the multiplexer chip U1 is connected to the USB interface switching signal CTR_SEL; the power supply terminal of the multiplexer chip U1 is connected to the positive voltage VDD1; the shutdown control terminal of the multiplexer chip U1 is connected to the shutdown control signal CTR_XSD;

[0039] like Figure 3 As shown, the first side first USB interface circuit 20 includes a USB connector U2, and the first side second USB interface circuit 30 includes a USB connector U3; the power supply terminals of the USB connector U2 and the USB connector U3 are respectively connected to the positive voltage VBUS_1; the USB channel interfaces of the USB connector U2 and the USB connector U3 are respectively connected to two USB channel interfaces in the first group of USB channel interfaces on the first side of the multi-way switching chip U1; Figure 3 As shown, the USB channel interfaces M_USB1_P and M_USB1_N on the USB connector U2 are connected to the USB channel interfaces M_USB1_P and M_USB1_N on the first side of the multiplexer chip U1, and the USB channel interfaces K_USB1_P and K_USB1_N on the USB connector U3 are connected to the USB channel interfaces K_USB1_P and K_USB1_N on the first side of the multiplexer chip U1;

[0040] like Figure 4 As shown, the first USB interface circuit 40 on the second side includes a USB connector U4, and the second USB interface circuit 50 on the second side includes a USB connector U5; the power supply ends of the USB connector U4 and the USB connector U5 are respectively connected to the positive voltage VBUS_2; the positive voltage VBUS_2 is provided by the first switching power supply circuit 80; the USB channel interfaces of the USB connector U4 and the USB connector U5 are respectively connected to two USB channel interfaces in the second group of USB channel interfaces on the second side of the multi-way switching chip U1; as shown Figure 4As shown, the USB channel interfaces M_USB2_P and M_USB2_N on the USB connector U4 are connected to the USB channel interfaces M_USB2_P and M_USB2_N on the second side of the multiplexer chip U1; the USB channel interfaces K_USB2_P and K_USB2_N on the USB connector U5 are connected to the USB channel interfaces K_USB2_P and K_USB2_N on the second side of the multiplexer chip U1;

[0041] like Figure 5 As shown, the third USB interface circuit 60 on the second side includes a USB connector U6, and the fourth USB interface circuit 70 on the second side includes a USB connector U7; the power supply ends of the USB connector U6 and the USB connector U7 are respectively connected to the positive voltage VBUS_3; the positive voltage VBUS_3 is provided by the second switching power supply circuit 90; the USB channel interfaces of the USB connector U6 and the USB connector U7 are respectively connected to two USB channel interfaces in the third group of USB channel interfaces on the second side of the multi-way switching chip U1; as shown Figure 5 As shown, the USB channel interfaces M_USB3_P and M_USB3_N on the USB connector U6 are connected to the USB channel interfaces M_USB3_P and M_USB3_N on the second side of the multiplexer chip U1; the USB channel interfaces K_USB3_P and K_USB3_N on the USB connector U7 are connected to the USB channel interfaces K_USB3_P and K_USB3_N on the second side of the multiplexer chip U1;

[0042] like Figure 6 As shown, the first switching power supply circuit 80 includes a single-channel switching switch chip U8, the input end of the single-channel switching switch chip U8 is connected to the positive voltage VBUS_1, and the output end is used to output the positive voltage VBUS_2; the control end of the single-channel switching switch chip U8 is connected to the first power supply switching signal PW_CTR_SEL1 through the resistor R2; when the first power supply switching signal PW_CTR_SEL1 is at a high level, the output end of U8 is connected to the input end; the model of the single-channel switching switch chip U8 is TPS22967, and its switch conversion rate control end (pin CT in the figure) is used to set the switch conversion rate;

[0043] like Figure 7As shown, the second switching power supply circuit 90 includes a single-channel switching switch chip U9, the input end of the single-channel switching switch chip U9 is connected to the positive voltage VBUS_1, and the output end is used to output the positive voltage VBUS_3; the control end of the single-channel switching switch chip U9 is connected to the second power supply switching signal PW_CTR_SEL2 through the resistor R3; when the second power supply switching signal PW_CTR_SEL2 is at a high level, the output end of U9 is connected to the input end; the model of the single-channel switching switch chip U9 is TPS22967, and its switch conversion rate control end (pin CT in the figure) is used to set the switch conversion rate;

[0044] like Figure 1 As shown, the switching indication circuit 100 includes a resistor R1 and a light-emitting diode D1. One end of the resistor R1 is connected to a positive voltage VDD1, and the other end is connected to an anode of the light-emitting diode D1. The cathode of the light-emitting diode D1 is connected to a selection switching end of the multi-way switching chip U1. When the USB interface switching signal CTR_SEL is at a high level, the light-emitting diode D1 is off, and when the USB interface switching signal CTR_SEL is at a low level, the light-emitting diode D1 is on.

[0045] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A USB interface switching device, characterized in that: include: A multi-way switching circuit (10), a first USB interface circuit (20) on the first side, a second USB interface circuit (30) on the first side, a first USB interface circuit (40) on the second side, a second USB interface circuit (50) on the second side, a third USB interface circuit (60) on the second side, a fourth USB interface circuit (70) on the second side, a first switching power supply circuit (80), and a second switching power supply circuit (90); The first side of the multi-channel switching circuit (10) includes a first group of USB channel interfaces, the first group of USB channel interfaces includes two USB channel interfaces, which are respectively connected to the first side first USB interface circuit (20) and the first side second USB interface circuit (30); the first side first USB interface circuit (20) and the first side second USB interface circuit (30) are used to connect to a control computer; The second side of the multi-channel switching circuit (10) comprises a second group of USB channel interfaces and a third group of USB channel interfaces; the second group of USB channel interfaces comprises two USB channel interfaces, which are respectively connected to the first USB interface circuit (40) on the second side and the second USB interface circuit (50) on the second side; the first USB interface circuit (40) on the second side and the second USB interface circuit (50) on the second side are used to connect a group of computer control devices; The third group of USB channel interfaces comprises two USB channel interfaces, which are respectively connected to the third USB interface circuit (60) on the second side and the fourth USB interface circuit (70) on the second side; the third USB interface circuit (60) on the second side and the fourth USB interface circuit (70) on the second side are used to connect to another group of computer control devices; The multi-channel switching circuit (10) is controlled by a USB interface switching signal CTR_SEL and is used to realize the switching between the first group of USB channel interfaces on the first side and the second group of USB channel interfaces and the third group of USB channel interfaces on the second side; The first switching power supply circuit (80) is controlled by a first power supply switching signal PW_CTR_SEL1 and is used to supply power to a first USB interface circuit (40) on the second side and a second USB interface circuit (50) on the second side when a first group of USB channel interfaces on the first side of the multi-channel switching circuit (10) is connected to a second group of USB channel interfaces on the second side; The second switching power supply circuit (90) is controlled by a second power supply switching signal PW_CTR_SEL2 and is used to supply power to a third USB interface circuit (60) on the second side and a fourth USB interface circuit (70) on the second side when a first group of USB channel interfaces on the first side of the multi-channel switching circuit (10) is connected to a third group of USB channel interfaces on the second side.

2. The USB interface switching device according to claim 1, characterized in that: The USB interface switching device further comprises a switching indication circuit (100) for indicating the connection switching state of the multi-channel switching circuit (10).

3. The USB interface switching device according to claim 2, wherein: The multi-way switching circuit (10) comprises a multi-way switching chip U1; the first side of the multi-way switching chip U1 comprises a first group of USB channel interfaces, the first group of USB channel interfaces comprises two USB channel interfaces; the second side of the multi-way switching chip U1 comprises a second group of USB channel interfaces and a third group of USB channel interfaces; the second group of USB channel interfaces comprises two USB channel interfaces; the third group of USB channel interfaces comprises two USB channel interfaces; the selection switching terminal of the multi-way switching chip U1 is connected to a USB interface switching signal CTR_SEL; the power supply terminal of the multi-way switching chip U1 is connected to a positive voltage VDD1; and the shutdown control terminal of the multi-way switching chip U1 is connected to a shutdown control signal CTR_XSD.

4. The USB interface switching device according to claim 3, characterized in that: The first side first USB interface circuit (20) comprises a USB connector U2, and the first side second USB interface circuit (30) comprises a USB connector U3; power supply ends of the USB connector U2 and the USB connector U3 are respectively connected to a positive voltage VBUS_1; and USB channel interfaces of the USB connector U2 and the USB connector U3 are respectively connected to two USB channel interfaces in a first group of USB channel interfaces on a first side of the multi-way switching chip U1.

5. The USB interface switching device according to claim 3, characterized in that: The first USB interface circuit (40) on the second side includes a USB connector U4, and the second USB interface circuit (50) on the second side includes a USB connector U5; power supply ends of the USB connector U4 and the USB connector U5 are respectively connected to a positive voltage VBUS_2; the positive voltage VBUS_2 is provided by a first switching power supply circuit (80); the USB channel interfaces of the USB connector U4 and the USB connector U5 are respectively connected to two USB channel interfaces in the second group of USB channel interfaces on the second side of the multi-way switching chip U1.

6. The USB interface switching device according to claim 3, characterized in that: The third USB interface circuit (60) on the second side includes a USB connector U6, and the fourth USB interface circuit (70) on the second side includes a USB connector U7; the power supply ends of the USB connector U6 and the USB connector U7 are respectively connected to a positive voltage VBUS_3; the positive voltage VBUS_3 is provided by a second switching power supply circuit (90); the USB channel interfaces of the USB connector U6 and the USB connector U7 are respectively connected to two USB channel interfaces in the third group of USB channel interfaces on the second side of the multi-way switching chip U1.

7. The USB interface switching device according to claim 3, characterized in that: The first switching power supply circuit (80) comprises a single-channel switching switch chip U8, the input end of the single-channel switching switch chip U8 is connected to a positive voltage VBUS_1, and the output end is used to output a positive voltage VBUS_2; the control end of the single-channel switching switch chip U8 is connected to a first power supply switching signal PW_CTR_SEL1 through a resistor R2.

8. The USB interface switching device according to claim 3, characterized in that: The second switching power supply circuit (90) comprises a single-channel switching switch chip U9, the input end of the single-channel switching switch chip U9 is connected to the positive voltage VBUS_1, and the output end is used to output the positive voltage VBUS_3; the control end of the single-channel switching switch chip U9 is connected to the second power supply switching signal PW_CTR_SEL2 through the resistor R3.

9. The USB interface switching device according to claim 3, characterized in that: The switching indication circuit (100) comprises a resistor R1 and a light emitting diode D1, one end of the resistor R1 is connected to a positive voltage VDD1, the other end is connected to an anode of the light emitting diode D1, and a cathode of the light emitting diode D1 is connected to a selection switching end of a multi-way switching chip U1.

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